Manganite heterojunction photodetectors for femtosecond pulse laser measurements |
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| Authors: | Saisai Zhao Kun Zhao Hao Ni Wenfeng Xiang Songqing Zhao Yu-Chau Kong Hong-Kuen Wong |
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| Institution: | 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, People''s Republic of China;2. Department of Physics, The Chinese University of Hong Kong, Hong Kong, People''s Republic of China;3. International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, People''s Republic of China |
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| Abstract: | We report a sensitive photodetector, based on a manganite junction La2/3Ca1/3MnO3/Si, for femtosecond (fs) pulse laser energy per pulse and average power measurements. The La2/3Ca1/3MnO3/Si photodetector exhibits D? (normalized detectivity) greater than 5.229×109 cm Hz1/2 W?1. The open-circuit photovoltage and short-circuit photocurrent responsivities reach ～268 V/mJ and ～275 A/mJ for single pulse irradiation, respectively, and the open-circuit photovoltage responsivity reaches ～1.7 V/W for average power illumination. The experimental results make the manganite junction a promising fs laser measurement detector and reference standard for calibrating fs lasers. |
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